bobbins



. I 2 sheens-sheet 1. I'. B. D-OERING.. y ROCK DRILLING MAGHINB.

N0. 77,597. Patented Maya, 1868.

.2 Sheets-Sheet 2.

.F. B. DOERING. 1100K DRILLING MACHINE.

No. 77,597. Patented Mayv, 1868.

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FREDERIGK BERNARD DGI-RING. OF LONDON. ENGLAND.

Lettere Patent No. 77 ,597, dated llfay 5, 1868; patented z'tt England, January 7, 1867.

IMPROVED ROGK-DRILLING MACHINE.

die eljehule refeeret te in these tetten rteut mit meting niet nf tige rame.

TO ALL WHOM l'l MAY CONCERN:

Be it known that I, Fnnnsnrcn Bnnwnnn Dfsnnvo, have invented or discovered Improvements in Engines for Boring and Working Rook and other materiel; and I do hereby declare that the following is o fdll, true, und exact desoriptionthereoi', reference being had to the accompanying' drawings, und to the letters and figures marked thereon; that is to say- My invention mainly consists in the employment, in combination 'with the ordinary cylinder, in which the piston which actuates tho boring-tool works, of. small distributing-cylinder, formed with ports, as hereafter described; also in the employment, in combination with this small distributing-cylinder, of a valve-cylinder und two other cylinders, the piston-.rods of which are connected to pawls, as hereafter mentioned. These three cylinders are in communication with the small distributing-cylirider, which thus works the valve of the ordinary cylinder, and the pawls, which oct upon ratchet-Wheels `for producing the rotary motion of the piston and tool, and the advance motion of the engine. The small cylinder is placed at the side of the ordinary cylinder, or in other convenient position, and is supplied with compressedv air, or other motive-ugent, from the main pipe. The small distribnting-cylinder has two pistons, between which the ai'r is always contained. v In the back stroke of these two pistons, the nir issues through an outlet-port or ports,`in communication, by pipes, with'the-valvecylinder above referred to, which works the slide-valve o f the ordinary cylinder, and with the two other cylin ders abovcmaferrod to, the piston of one of which works the pawl, which, by means'of a ratchet-wheel, imparts rotary motion to the ordinary piston-:1nd tool, while the piston ot' the other of these two cylinders works thc pawl, by .means of which the advance movement is given to the engine as the work proceeds. When the cylinder ofthe advance movement Ais vertical orinclined, I sometimes tit a spring on the piston or pistonrod, to prevent this piston and the pawl falling, except when the tool hns cnt to thev required depth. b'ut thc spring of the pawl will Lgenerally be found suicicnt for the purpose. i

In the forward stroke of the pistons of thc small cylinder, the air issues through on outlet-port or ports in communication with the valvecylinder, and with .the cylinder connected with the pawl of the rotary movement; and when the tool has cut to it sniicient depth, the pistons ofthe small distributingcylinder are enabled to malte a forward stroke of sufficient length to open another outlet-port, in communication with the cylinder connected with the pawl ot' the advance movement, whereby tho spring of this pawl (when a spring is used) is overcome, and the pawl brought baci:- and made to catch into another tooth of its ratchet-wheel, which is'then caused to rotate the distance of one tooth, when the main pist-on makes its back stroke, and thus advance the engine.

The piston-rod of the small cylinder or cylinders is or are connected by a cross-head in front, or at tho back of the piston-rod of the ordinary cylinder, from which the movements of the distributing-pistons are obtained.

Figure l of the accompanying drawings isa pian oi thc upper side,

Figure 2 is a view from below.

Figure 3 a front, and

Figure 4 a boeit-endl view of a boring-engine, constructed as hercinbeiore described.

Figure 5 is a longitudinal section, and

Figure (i a similar section, at right angles thereto.

A is the ordinary cylinder, carried between two longitudinal bars, B C, one of which,'B, is threaded.' F is the piston, and G the piston-rod, the front end of' which carries the borer or tool. Tho piston-rod and piston have a squn e longitudinal aperture, in which a square rod, H, (its. Tho rear end of this rod is carried through the back of the cylinder, and carries a ratchet-wheel, I. When this wheel is4 caused to rotate, the central rod H turns, together with the piston, piston-rod, and tool. The piston, however, is free to move backward and forward independently of the rod H. K K are theinlet-ports of the cylinder A, and Lis the port through which vthe airis received. M is my small distributingcylinder, shown seperately in section in Figure 7. N

is the valve-cylinder, O the cylinder in connection with the ratchet-wheel 1, and P is the cylinder in connection with theratchet-wheel D. These three cylinders ure, as'before stated, in communication with thc distributingcylinder M. This cylinder is placed at the side, or forms part of the ordinary cylinder A, as shown, or' in ether convenient position, and is supplied with compressed air or other motive-agent though the port or apertirre` Q, (see iig. 7,) which is in connection with the main pipe L. The cylinder M has two pistons, R It, on one rod, S, betwcen-whiohlpistons the'nirisalways-contained 'The front end oi' the rod is connected by a cross-head or collar, T, to the main piston-rod, G, so that the tvo rods move simultaneously and equally. In the back stroke of the two pistonsblR'R, the air issues through an, outlet-portfU. in communication, by pipes V V V, with the valve-,cylinder N, 'end with the other two cylinders, 0 and P. The airis thus admitted into ,the valvecylinder N; and the valve m'oved'back, so as to admit air into the ordinary cylinder A, to produce the forward stroke of the piston-F, and consequently of the pistons R R,- while at the same time the air admitted into tho cylinder 0 drives for-ward ,the piston of this cylinder. This piston causes the pawl X to move the ratchet- 'wheel I the distance of one tooth, and thas produce the partial 'rotary-motion of the piston F and tool. The air-at the same time is admitted into the cylinder P, and, if Vthe piston of this cylinder-isatthe back end oi' the cylinder, it drives the piston,and causes the pawl Z to move the ratchet-wheel D the distance of one tooth, vand thereby advance the engine, A

In the forward stroke of the pistons F andvR, the air issues through an outlet-port, a, in communication, bypipes b, with the valve-cylinder N, and with the cylinder O of the rotary movement,whereby the valve is moved over to supply air'at the front end of the cylinder A, and the p'awl is drawn back intoanother tooth of the wheel I, readyto ast' at the next forward strokeof its piston. .The outlet-porta is not in communication with the cylinder P' of the advance movement, and the piston oil this cylinder, therefore, remains at the forward end,.la`n,d the'wheel'D isnot acted on by its pawl at the next back stroke of the pistons F and R;

but whenthe tool.has ont to a certain determneddepth, the pistons R are enabled to maken forward stroke snilicient to'openr ran outlet-port, c, 'aswell as the port a, and the air then passes through the port c, and a pipe, d, into ftheV forwnrd4 end of the cylinder P, whereby the piston of this cylinder makes its back stroke, drawing thepawl z into the next. tooth of the wheel. D, ready to move this wheel forward at the next baclt stroke of the pistons R. when the air from the portU enters therbsck end of the cylinder P, drives the piston of the cylinder?, and actuates the pavrl Z so as to produce the advance movement. g is an outlet in the cylinder M, to form an 4eirhanst from the pipes V 'V V, sndf is another outlet, to form an exhaust from the pipes and-d.

Between the lugs E"E, I fit a nut, threaded' internally fromy'to z, ,to gear into the threads on the bar B,

This nut il in .two parts, hinged at x, and can .be clamped together or opened ont',- es required. One -cnd of 2 the nut passes through one of the lugs, and carries a ratchet-wheel, D, actuated bya' paw] on the piston-rod of the cylinderl. As this wheel is turned-the engine is caused to advance, as befoneexplained.

When 'it snecessary to return the engine, to commence a fresh working, the nut is opened out to disenga-ge the threaded portion from the bar B, the engine-is pushed back 'the required distance, andthe nnt closed and clamped. Mitre-gearing, fitted with a handle, may be employed, by turning which handle the engine can' be moved hack upon the bars B C, to begin a fresh hole or the engine may be moved back by rotating the har D, or otherwise. l

Sometimes I employ two distributing-cylinders, oneof them being arranged to work the valve-cylinder N, and the other to work tho pawl-oylinders O and P. l

When I employ steam, instead of compressed 'n ir, as the motive-agent, I enclose the valve of the cylinder A in a bei: or casing, and use'tho ports in the ordinary manner i What I claim as m'y invention, and desire to secure by Letters Patent, is'- 1.- Thecombination of 1the following elements or parts, viz, iiist, an ordinary cylinder, provided with ,a piston and piston-rod, `suitable for supporting a boring-tool; second, n distributing-cylinder, provided. with ports' and pistons, actuated from the r'od of the. ordinary cylinder, the combination being substantially as described.

'2. The cdmbination of the following elements or parte, viz, iirst, an ordinary cylinder, provided with `a. piston and-rod suitable fer supper-tinge. boring-tool; second, a distributing-cylinder, provided with ports and pistons, actuated from the rod of-'the ordinary cylinder; third, a cylinder actuating a pawl, tlle combination being substantially as set forth. i i

3. The combination ofthe Vfollowing elements or parte, viz, first, an ordinary cylinder, provided with s piston and piston-rod suitable for supporting'a boring-tool; second, a distributing-cylinder, provided with ports and pistons, actuated fromthe rod of the ordinary cylinder; third, a`oylinder actuating,a pnwl, the-combination being substantiallyy as set forth.

4. The combination of these elements or parts, viz, first, an ordinary cylinder, provided with a piston andV rod. suitable for supporting a4 boring-tool; second, a distributingcylinder, provided with ports and pistons, actuated from the rod of the ordinary cylinder; third', two-cylinders, actnatingfeach a paul, the one to revolve the tool, the otherV to advan'ce'the boring-tool towards its work, the combination being substantially as described.

In witness whereof, I, the said FnuDsnIeK' Bulmahn Durante, have hereunto set my hand, this third day of August, one thousand eight hnndredvand sixty-ssven.

F. B. DCERING.

Witnesses:

C. E.- Burman, 166 I'let Street, London. H. GARDNER, 166 4I'Zeet Street, London. 

